Solve.$50 is 20% of how much?
A. $1,000
B. $40
C. $250
D. $10
Answer: C
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Find the length of the curve.x = 4 sin t + 4t, y = 4cos t, 0 ? t ? ?
A. 4? B. 16 C. 8 D. 24
Find the slope of the polar curve at the indicated point.r = 4 sin 4?, ? = 
A. 
B. undefined
C. 1 + 
D. -1
Solve the problem. Round to the nearest tenth.A flagpole casts a shadow 28 feet long. At the same time, the shadow cast by a 39-inch-tall shrub is 78 inches long. Find the height of the flagpole.
A. 12.5 ft B. 56.0 ft C. 54.5 ft D. 14.0 ft
Solve.The daily profit in dollars of a specialty cake shop is described by the function 
where x is the number of cakes prepared in one day. How many cakes are prepared per day if the company has a daily profit of zero dollars?
A. 16 cakes or 40 cakes B. 28 cakes C. 18 cakes or 37 cakes D. 864 cakes